The game feels more like a DLC to its great predecessor than a game in its own right.
I finished the main story after 10 hours and found it okay. The real strength of the story only became apparent in the last 15 minutes.
Otherwise, the story was rather boring and the antagonist in the game couldn't be less interesting.
Now I have an open city to explore and couldn't be less interested in collecting any collectibles.
It's not a bad game, but for me it doesn't come close to the original.